We have already completed the analysis of the most massive cluster in this sample, i.e. MOO J1142\(+\) 1527 at \(z=1.2\)  [1]}. As shown in Fig. REF , the quality of the temperature map of this high-\(z\)  cluster that we realized from the joint analysis of Chandra and NIKA2 data with a combined exposure of only 23.2 hours (right) is similar to the one achieved from the analysis of the X-ray spectroscopic data obtained with a 42.5 hour Chandra exposure of the \(z=0.55\)  cluster MACS J0717.5\(+\) 3745 (left) [2]}. Obtaining a similar map using only X-ray information from Chandra at such high redshift would have required an exposure at least 30 times greater. This highlights the strong complementarity between X-ray and high angular resolution SZ observations to go beyond the characterization of individual systems at \(z > 1\)  and start investigating the ICM properties in samples of high redshift clusters.
